You could have just rinsed them out with water....there's huge numbers of reloaders using SS media and water to clean their cases. Most dry them in the oven on low temp.

I am one of those people. I have been doing it for a couple of years and it's by a long shot the best way to clean your brass inside and out.

I don't dry them in the oven tho.

I use hot water, SS pins, dish soap and Lemi Shine. I drain the dirty water and rinse with hot water 2-3 times then I shake out the SS pins and dump the brass in a bath towel, roll up the ends of the towel and shake the brass for about 30 seconds. Because the brass is warm from the hot water the pistol brass is almost dry at this point and rifle only needs to set over night. If you needed the brass ready to use right after tumbling I would either blow dry it or put it in the oven on the lowest setting for 20-30mins.

You can clean up the nastiest looking brass to new or next to new condition.

The best part is the SS pins last forever so you never need to replace the media.